A) as follows 1- The reason for the decrease in concrete resistance when the temperature rises? 2- Reasons for preferring ready-mixed concrete over other types of concrete? 3- Why is it not preferred to mix concrete for a period of time more than required?

Q: A project specifies a concrete strength of 24.1 MPa. Materials engineers will design the mix for a…

A: (a) Calculate the average compressive strength by using this formula:-

Q: Q1. The design of a concrete mix requires 1173 kg/m³ of gravel in dry condition, 582 kg/m³ of sand…

A: We have to find out the masses of gravel, sand, and water on site, Given data: mixture content of…

Q: adhesion between cement and aggregate paste more important in highly resistant concrete 5- Why is it…

A: 1.) Temperature changes could cause cracks or sapling, distress, and aggregate expansion which leads…

Q: Example 6: Design a concrete mix for slab with dimension of (5x5x2.5) according to ACI by Volumatic…

A: Given data: 1- characteristic compressive strength at 28  days fmin = 30 MPa 2- Nominal maximum size…

Q: The design of a concrete mix requires 1173 kg/m3of gravel in dry condition,582 kg/m3of sand in dry…

A: The given data is: Gravel content=1173 kg/m3 moisture content = 0.8% Absorption =1.5% Sand…

Q: 2. In a ready-mix concrete plant, cylindrical samples are prepared and tested periodically to detect…

A:

Q: The strength of concrete prepared, cured & tested under specified conditions at a given age is…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: Three 100*200 mm cylindrical concrete specimens were tested for 28 days compressive strength and…

A: Solution: Given: Three Compress strengths of same concrete sample: C1=25.5MPa C2=28.6Mpa C3=24.8MPa…

Q: Q3. Three concrete mixes with the same ingredients, except the amount of mixing water, and their…

A:

Q: How does shape and surface texture of aggregate effect workability, water requirement, and bond in…

A: Concrete is a combination of cement, aggregate, as well as liquid. Aggregate, typically makes up 60…

Q: Problem 2: If f = 3 ksi what is the modulus of elasticity Ec and the maximum tensile stress fr that…

A: f'c = 3 ksi or 3000 psi We need to calculate modulus of elasticity Ec and tensile stress fr

Q: The water–cement ratio is important because it influences all of the desirable qualities of…

A: Solution-(a)The water cement ratios is calculated using voids that are not filled with asphalt.(b)…

Q: A concrete mix includes the following ingredients per cubic meter: a. Cement = 400 kg b. Water = 176…

A: Given, Cement= 400 kg Water= 176 kg

Q: is the required average compressive strength to be used in your mix design? a. 3900 psi; b) 4000…

A: Concrete and rcc:

Q: The relation between strength and maturity for a concrete is known to be as follows: in SI units: f…

A: Given: The concrete is cured at 30oC. The time period is 7 days. The strength is 30 MPa. The time…

Q: 1. What is the unit weight of aggregate?

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Weight of Fine Aggregates: Weight of Coarse Aggregates: Weight of Water: Weight of Cement: Weight of…

A:

Q: A batch of concrete is composed of 200 lbm fine aggregate, 350 lbm coarse aggregate, 94 lbm cement,…

A:

Q: The following mix design information is provided to you for 1 m³ concrete. • Air content = 5% • w/cm…

A: Reference : Concrete technology, Mix design ACI 318 mix design code Given : Air content, w/c ratio,…

Q: (b) All basic chemical composition of Portland cement reacts with different rate of hydration. List…

A:

Q: 6.33 The results of a laboratory experiment to evaluate the effects of a plasticizer are shown…

A: From the Given Data W/C for Case 1 = 446/815 = 0.547 W/C for case 2 = 355/815 = 0.435 W/C for case 3…

Q: n=20 1. The relation between concrete strength (f.) and maturity (M) is as follows: f = (5+) + 10…

A: step 1-

Q: Which one of the following sentences is not correct? a. For many years, tensile strength has been…

A:

Q: Mixing and handling can significantly alter the air content of fresh concrete. Thus, field tests are…

A: Air entrapped concrete is used generally in areas with low temperatures and damages can occur due to…

Q: For concrete production, we mix 625 kg of fine aggregate and 830 kg of coarse aggregate. The fine…

A: The moisture content is also known as water content-  It is defined as the ratio of the weight of…

Q: In proportioning a concrete mix, the coarse and fine aggregates had the following properties…

A: Coarse aggregate weight = 800 lbDry aggregate weight = 350 lb

Q: It is important for the engineer to understand the basic properties of hardened portland cement…

A: The properties of hardened concrete are; Durability. Mechanical strength Fire resistance. Impact…

Q: The results of a laboratory experiment to evaluate the effects of a plasticizer are shown. a.…

A: Given data: Plasticizers are used for various purposes according to the requirement of…

Q: 1. Following data are given for designing a Portland cement concrete mix for a nonstructural…

A: Note:- Hi, thank you for the question. As per our Honor code, we are allowed to attempt the first…

Q: 1) Discuss the effect of specific surface of aggregate mixture on concrete strength Illustrate your…

A: here explaining by some fundamentals and by referring codes

Q: Subject: Concrete technology Q: a)What are the disadvantages of using calcium chloride in Portland…

A: Portland cement is the most common type of cement that is generally used throughout the world as a…

Q: Chapter 13 Question: What is the elasticity of concrete for a normal weight mix (unit weight equal…

A:

Q: 1.40 In a ready-mix plant, cylindrical samples are prepared and tested periodically to detect any…

A:

Q: A concrete mix consists of 5 gallons of water for each bag of cement. What is the expected…

A: To find the strength of the concrete depending on the values given. 5 gallons of water per each bag…

Q: The required W/CM ratio for our concrete mix is 0.65. The amount of water required in the mix is 100…

A: To find mass of cement and silica fume in the mix

Q: If the target slump of concrete is 30 mm, the maximum nominal size of the coarse aggregate is 25 mm,…

A: Case-1:Target slump of concrete is 30 mm,Maximum nominal size of the coarse aggregate is 25…

Types of Concrete

Concrete is the fundamental material used in civil engineering such as building materials for building structures. Concrete is an aggregate mixture of cement, sand, and fine and coarse rock pieces. The cement acts as a binding material that holds the compositions together, sets, and hardens with time. Apart from cement, there are other different types of binding materials used, such as lime concrete, bitumen, asphalt, and so on.